Application of Computer Method in Solving Complex Engineering Technical Problems

Wu, Yue; Qiao, Weiguo; Li, Yanzhi; Ya-bing, Jiao; Zhang, Shuai; Zhang, Zonghao; Liu, Huini

doi:10.1109/access.2021.3073490

Cited by 12 publications

(5 citation statements)

References 15 publications

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“…Due to the long-term mining of coal resources, most open-pit coal mines and some shallower underground mines have gradually been exhausted [3,4]. The development of coal resources has gradually moved toward larger underground mines [5,6]. For mining deep coal resources, as the osmotic pressure increases, the increase in micropore seepages in coal-bearing strata sandstone leads to serious shaft wall deterioration, which is one of the main disasters endangering the safe production of mines [7,8].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Simulations of Pore Structures and Seepage Characteristics of Deep Sandstones

Zhu,

Wu,

Zhang

et al. 2023

Processes

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Previously conducted studies have established that deep underground rock masses have complex pore structures and face complex geological conditions. Therefore, the seepage problem of such rock masses seriously affects engineering safety. To better explore the seepage law of deep rock masses and ensure engineering safety, indoor experimental methods such as casting thin sections, scanning electron microscopy, and mercury intrusion testing were utilized in this study. The microscopic pore shape, size, distribution, and other structural characteristics of sandstone in coal bearing strata were analyzed. The tortuosity calculation formula was obtained by the theoretical derivation method. And a numerical model was established for seepage numerical simulation research through microscopic digital image methods. The seepage law of surrounding rocks in the Tangkou Coal Mine roadway under different conditions is discussed. The research results indicate that the complexity of the pore structure in porous media leads to an uneven distribution of flow velocity and pressure within the medium. Meanwhile, with the change of physical properties, the fluid flow characteristics also undergo significant changes. The research results can effectively guide micropore water blocking, reduce the impact of groundwater on the environment, ensure the environment and safety of the project, and provide guidance for other geological projects.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Simulations of Pore Structures and Seepage Characteristics of Deep Sandstones

Zhu,

Wu,

Zhang

et al. 2023

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“…Regarding the multiple hazards of a large amount of groundwater under complex geological conditions and the problem of sustainable development, many scholars have carried out research from different aspects [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Seepage of Groundwater in an Underground Fractured Rock Mass and Its Sustainable Engineering Application

Qiao

et al. 2022

Applied Sciences

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Due to the existence of tiny cracks in rock, underground engineering has begun to consider how to divert a large amount of groundwater. To divert groundwater more effectively, it is necessary to master the seepage characteristics of fluids in the micropores of rocks. Based on rock samples obtained from an underground engineering site, this paper analyzes the microscopic pore structure of the rock through a combination of laboratory tests and numerical simulations and inputs this information into a computer model. The fluid seepage state in the rock under different conditions is simulated in the computer model, and parameters such as the fluid seepage velocity in the rock are obtained. Afterwards, it has been verified by engineering practice that the smallest remaining water inflow can reach 0.06‰. The results of this paper can effectively guide the discharge of groundwater to better manage water resources, greatly reduce the pollution of groundwater in construction and production environments, and reduce the pollution caused by grouting projects. Furthermore, the cleanliness and safety of underground engineering construction and production could be ensured.

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“…The numerical analysis of plates can be successfully performed using the finite difference method in variational approach. The literature on the subject contains numerous fundamental works on the finite difference method [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ] and publications in which this method was applied and positively verified for calculating plates [ 26 , 27 , 28 ], tanks [ 29 , 30 , 31 , 32 ], shell structures and others [ 33 , 34 ]. Experimental verification of performed numerical calculations plays a key role in contemporary design.…”

Section: Introductionmentioning

confidence: 99%

Experimental Validation of Deflections of Temporary Excavation Support Plates with the Use of 3D Modelling

Marek¹,

Wiesław

Szymczak-Graczyk

et al. 2022

Materials

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Almost every project is accompanied by earthworks, very often involving various types of excavation, and the work of people in the excavations. One of the most important tasks in earthworks is to ensure that the walls of the excavation are protected against sliding and that people working in and around the excavation are safe. Very often, in addition to criteria relating to safety and stability of the excavation, economic considerations are also an important criterion. This issue arises as early as the design stage and is related to the choice of construction and materials of which the shoring is to be made in such a way as to be able to withstand the pressure of the soil, ground loads resulting from stored excavated material and the operation of working machinery. Ongoing monitoring of the excavations and their reinforcement is also very important. The paper describes the unique results of experimental field tests, the purpose of which was to analyse the values of deflections of steel support plates of temporary excavation carried out on the object in 1:1 scale. The course of the experiment is presented for excavation support plates with a total depth of 6 m. Direct tests of the deflection arrow were carried out using two techniques, traditionally with a patch, and with laser scanning. Field tests were carried out for the designed situation without backfill load as well as for backfill load of 3.84, 15.36, 26.88 and 38.4 kN·m−2, respectively, for two measurement stages. Stage-I of the study consisted in collecting the results for soil in intact condition, whereas Stage-II collected results for loosened soil. The research experiment was supported by numerical calculations performed using the finite difference method in variational approach. The measured maximum deflections ranged from 14.40 to 16 mm, and the calculated values were 14.95 and 14.99 mm. The comparison of calculation results and tests proved to be very consistent. The analysis of the values of deflections showed that backfill load does not have a significant effect on the deflection of the lower plate, but it does affect the deflection of the first plate up to a depth of 1.2 m. Based on the obtained results, it is recommended to assume the limit (maximum) deflection arrow for support plates of temporary excavations at least as wgr= L/130, where L is the span of the plate. The calculation of deflection values was based on deflection values obtained experimentally and numerically for two steel variants: S235JR and S355JR. The wgr indicator of the maximum deflection arrow proposed by the authors is not stipulated by the industry standards, but it can be very helpful for the designing of excavation reinforcement.

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Application of Computer Method in Solving Complex Engineering Technical Problems

Cited by 12 publications

References 15 publications

Experimental and Numerical Simulations of Pore Structures and Seepage Characteristics of Deep Sandstones

Experimental and Numerical Simulations of Pore Structures and Seepage Characteristics of Deep Sandstones

Seepage of Groundwater in an Underground Fractured Rock Mass and Its Sustainable Engineering Application

Experimental Validation of Deflections of Temporary Excavation Support Plates with the Use of 3D Modelling

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